Linux Software Raid 1 Recovery Question

[kentborg at borg.org (Kent Borg)]

On Wed, Sep 25, 2002 at 03:43:06PM -0400, ron.peterson at yellowbank.com wrote:
> boot=/dev/sda
> image=/vmsomethingorother
>   root=/dev/md2
> 
> Otherwise, like you say, how could the system find md stuff before there
> is a kernel.
> 
> But you were sucessfully booting before...  (?)

I am successfully booting now, on a two-disk machine, with the
following lilo:

  prompt
  timeout=50
  default=linux
  boot=/dev/md6
  map=/boot/map
  install=/boot/boot.b
  message=/boot/message
  vga=0x303
  linear

  image=/boot/vmlinuz-2.4.18-10
          label=linux
          initrd=/boot/initrd-2.4.18-10.img
          read-only
          root=/dev/md5

No mention of any hda or hdc.  I don't know how it works, but it
works.



What I don't know how to do is:

 - Boot my above working machine with the first disk missing.

 - Boot my co-worker's machine with the first disk blown away by
   Debian (plugged in or not).

I think these are the same situation, for we have the same
motherboard, approximately the same hard disks, and the same 7.3
version of Red Hat.


For bootable software raid 1 to be worthwhile, it seems that figuring
out how to operate when either disk dead is key.

-kb